Type-casting machine



June 1 1926.

1,586,760 J. F. NORMAN TYPE CASTING MACHINE Filed Nov. 21, 1925 %se//ZMAM/f [76? if at.

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FATENT TYPE-CASTING MACHINE.

Application filed November 21, 1925.

The invention relates to improvements in double-acting type castingmachines of the kind described in specification No. 1,165,997. Suchmachines have hitherto been subject to various disadvantages, which havegreatly restricted their use for the following reasons.

It will be readily appreciated that, in order for this kind of machineto give good results, all the moving parts must be very carefullyconstructed and exactly fitted, particularly those which make up themolds. Moreover, when the molten metal is injected into the mold aconsiderable quantity of heat must be conducted away before the type cansolidify and be ejected from the machine, and the quicker this operationcan be effected, the better will be the quality of the product and thespeed of production. In the machines previously proposed, thecoolarrangements consisted of a short Sta tionary water cooled top platecarrying a plate forming the upper part of the molds, and a waterchannel or jacket formed in the bed of the machine and in contact with astationary plate forming the lower part of the molds, the side portionsand slidable matrix ends of the molds being carried be tween said platesforming the upper and lower mold parts, upon a traveling mold carrier.The channels for the cooling water were concentrated about the placewhere the molten metal was injected, but the arrangenent was found to beof little practical use, because the bottom mold plate became very hotatone point only, and the heat was mainly conducted through the travellingcarrier. Consequently the type would not readily solidify and thesliding parts tended to stick fast in their slides, owing to the heat,which could only be remedied by slacl ening the lit and employing only afew molds on a long carrier and operating the machine ata very slowspeed, making it commercially at a serious disadvantage. These drawbacksare moreover not remedied by merely forming each mold complete withmovable bottom, sides and top as a single unit, since in addition to thedefects above stated, the conduction of heat to the stationary waterjackets will be still more ditlicult.

By the present invention all the above mentioned disadvantages areovercome and a machine is provided which is capable of 55 casting typeof high quality with great Serial No. 70,704.

rapidity and with little wear upon the mov ing parts.

According to the invent-ion I provide a type casting machine of the kindabove re ferred to, characterized by a travelling bottom plate for themolds, which plate also forms part of a travelling water jacket.Preferably the water jacketis integral with the travelling mold carrier,through the whole length of which it may extend, and according to afurther feature of the in.- vention the water is supplied to the jacketby means of telescopic tubes, secured on the one hand to the travellingmold carrier and on the other hand to the machine bed or otherstationary part.

By this means the machine is maintained at a substantially uniform heatthroughout, which can be readily controlled within the desired limits byvarying the quantity of water passed, and besides giving a high qualityproduct at high speed of production, enables a long mold carrier to beemployed carrying any desired number of molds and matrices.

In order that the invention may be clearly understood and readilycarried into effect a preferred embodiment of same is illustrated in theaccompanying drawings, wherein,

Fig. 1 is elevation of a part of the machine bed carrying the travellingmold carrier, showing three side mold portions mounted in position byway of example. Fig. 2 is a plan. Fig. 3 is a cross section taken online 33 of Fig. 2 to an enlarged scale, and Fig. 4 is an elevation ofthe complete machine to a reduced scale.

Referring to the drawings, the frame 1 and stationary machine bed 2(which needs no water jacket) are of usual form and size, and upon thebed is slidably mounted the travelling mold carrier 3. The latter can beof-any convenient length, for example considerably longer than the bed 2(see Fig. 4), and is formed internally with two water channels orjackets l, 5, which extend throughout practically the whole length ofthe carrier 3, communicating at one end by passages 6. The channel lpasses substan tially centrally through carrier 3, and belowv the rearparts of the side mold portions 7, between which slide the matrices (notshown). The other channel 5 lies adjacent the front or casting edge f emeld. ar-

rier and below the front parts of the side mold portions 7 whichactually constitute the s of the molds, and a plate 8 ot forms aWater-tightjoint and all'ords an accurate surface which will not warpwhen 10 heated, the channel has formed therein at short interrals bosses9, to which the plate.

S is firmly secured bycountersunk screws 10, passages 11 beingproridedin the bosses 9 permitcirculation ot the Water andserving"incidentally to improi'e'the cooling ei'licienev. .WYater inletpassages 12 are prorided in the carrier 3 communicating with channel 5,and outlet passg'es' 13 con'ununieating with channel st. Channel 5 mayalso belined with a thin copper casing.

The cooling Water can be supplied and Withdrawn by any suitable means,such as torexample by flexible pipes fitted to the carriers andcommunicating witlrpassages i2, 15 but a ipuch more satisfactory methodis by the use of telescopic tubesyas provided according to a furtherfeature ot'the invention. A bracket llcarrying tubes 17, 18 is bolted tothe carrierf?) conduits lo, 16 in said bracketcommunicating with saidtubes and passages lii 13. The other ends o't said tubes slide in astutiingl box l9 secur'ed to the bed 2. Tubes 2Q, 21 are connected withthe stalling box 1.) and a bracket 22 secured the opposite endot the bedas shown in -l-. and pipes 23, 2% attached to said tubes respectivelsupply and lead away the coolinz'i water. Tubes 17, 15% can thu l' L J.scopically within tubes ill the car S is moved to and fro along the bed,and it will also be apparent that this telescopic movement will assistthe circulation of Water through the cooling system by alternatelydrawing irater in and forcing it out.

The iath of the cooling Water may be traced as follows. From inlet pipe25, through tube 20. tube 19. conduit 16. inlet 'iassacjeslil'alongchannel and passages 11, to passages (hand thence back throughchannel l. outlet assages 13, conduit 17, tubes 17. 21 and away by pipe2-1.

The casting is' eltected in known manner by moving the carrier 3 beneatha stationa ry water cooled upper mold plate and cams as described inspecification No. 1,165,997, but it is eiident that by'proriding atravelling bottom mold plate 8 which is cooled phroughout the whole ofits length by an attached Water jacket, not only is the heat or" themolten metal applied at a ditl'erent point on said plate at each castingoperation but a continual supply of cooling" water rum ning along saidplate rapidly disperses and removes said heat while at the same time thebody of the carrier 3, the matrices and the side mold portions 7 arealso cooled. Thus the whole carrier and adjacent parts are maintained ata moderate temperature, the high temperature of casting being onlymomentary and its cil'ects negligible, the moving parts may be an masliding tit without danger. of jannnhnr and the machine is thereforecapable of producing type an eigceedinp'ly good quality and at a highspeed of production.

I claim:

A do iblc-acting type casting machine having a travelling mold carrier,a travelling bottom mold plate secured to said carrie r, a trarellingWater jacket in said carrier in contiguity with said plate. and meansfor conducting ater through said jacket. substantiall; as and torthepurpose set forth. W

2. A double-acting type casting machine having a travelling moldcarrier. a \rater channel formed in said carrier. a bottom mold platesecured to said carrier in contigultywith said water channel, and meansi or conducting ater to and from said channel, substantially asdescribed.

3. A double acting type casting machine having a. travelling moldczrrier. a trarelling bottom mold plate secured to said carrier, atravelling, Water jacket in said carrier in contiguity with said platecomprising' a water channel adjacent one side and a second parallelwater channel adjacent the center of the carrier, and means forconducting water to and from said jacket, substantially as described.

A double-actingtype casting; machine having" a travelling mold carrier,a travelling bottom mold plate secured to said carri er a travelling atci. jacket in said car rier in cont-iguity with said plate comprising awater channel adjacent one side and a second parallel Water channeladjacent the center of the carrier, telescopic Water tubes connectedbetween said travelling water jacket and a stationary part of themachine. and means for supplying Water to sa d tubes, substantially asdescribed.

JOSEPH FREDERICK NORMAN.

